Tiling of the data
SAM tiles the data into 1 km squares (default square size can be modified)
for the SAE. Tiles should not be so big as to increase processing time
or so small as to involve unnecessary and reduntant processing due to
the 100 metre buffer around each tile. One square km tiles offer a good
compromise.

Allocation of these tiles to multiple
PC's / users

On smaller jobs where all tiles are processed by one operator
on one computer, allocation of tiles is not really an issue. On larger
jobs where in order to fully ustilise resources it is necessary to allocate
tiles to multiple PCs or operators, SAM provides for two levels of users:
supervisors and operators. The supervisor allocates tiles to the operators.

Using the "Operators
tab", each operator's name is entered and given a colour to represent
the tiles they have been allocated. Allocating squares is done in the
"Allocation tab"
by clicking and dragging over the squares to be allocated to an operator.
The Allocation tab then displays those squares with a coloured diagonal
line in the colour of the operator.

Monitoring the progress of single
/ parallel processing over one or many PCs
Using the "Progress
tab" the supervisor can determine the progress of the spatial
adjustment. By placing the cursor over a square tile one can determine
if the adjustment has been started on that particular tile, if it's in
progress or if it has been completed and thereby determine the overall
progress for a particular user / PC as well as the overall progress.

Compiling the adjusted spatial
data
Compiling the adjusted spatial data consists of bringing together the
adjusted tiles for error detection using feature level reporting later
saving to the temporary work area. There is a 100 metre buffer around
each of the 1square km tiles causing an overlap with surrounding tiles.
SAM uses a weighted mean averaging process to deal with any mis-alignment
between points in the buffer zone of multiple tiles.

Generating feature level reporting
and detecting errors
Normally less than 0.2% of features end up having an error in the adjusted
coordinates. To detect these possible errors SAM compares the co-ordinates
of the original feature and the adjusted feature to calculate the changes
in length, position and angles. These changes are sorted displayed from
the biggest to the smallest. The Supervisor can use this list to zoom
to each feature and inspect for possible errors.

Correcting errors found and writing
the upgraded data to the temporary work area
Some errors may be rectified in SAM/SAE whilst other errors have to be
fixed in the corporate GIS application. SAM links to the SAE's "Find,
Fix and Forget" functionality which can be used to rectify many errors.
SAM can also transfer the location of features to the corporate GIS application
for final editing